classmates = [
    "张三",
    "李四",
    "王五",
    "赵六",
    "孙七",
    "周八",
    "吴九",
    "郑十",
    "钱小一",
    "陈小二",
    "蒋小三",
    "韩小四",
    "沈小五",
    "张小六",
    "李小七",
    "王小八",
    "赵小九",
    "孙小十",
    "周小一",
    "吴小二"
]

for student in classmates:
    # todo 对每个同学说hello
    print(f"hello {student}")
    print("hello {} {}".format(student, student))